82830-49-7Relevant articles and documents
N-arylalkyl-N-heteroarylurea and guandine compounds and methods of treating HIV infection
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, (2008/06/13)
A method for treating HIV which comprises a compound of the formula STR1 wherein A is STR2 and Zi is O, Se, NRa or C(Ra)2, and Zii is --O or (=O)2 ; wherein R1, R2, R3, and R4 are as defined in the specification.
Selective, Electrophilic Fluorinations Using N-Fluoro-o-benzenedisulfonimide
Davis, Franklin A.,Han, Wei,Murphy, Christopher K.
, p. 4730 - 4737 (2007/10/02)
The synthesis of N-fluoro-o-benzenedisulfonimide (NFOBS, 2) and its use as an "electrophilic" fluorinating reagent with nucleophilic substrates is described and compared with that of N-fluorobenzenesulfonimide (NFSi, 3).NFOBS (2) is prepared in three steps in 81percent overall yield from commercially available o-benzenedisulfonic acid (4) and involves treatment of o-benzenedisulfonimide (6) with dilute fluorine (10percent F2/N2).Reaction of 2 with metal enolates, silyl enol ethers, and 1,3-dicarbonyl compounds affords the corresponding α-fluoro compounds in yields up to 95percent, with good control of mono- and difluorination.Fluorination of ortho-metalated aromatic compounds was achieved in modest to good yields (10-80percent).While the reactivities of 2 and 3 are similar, better yields were observed with the former reagent in the fluorination of metal enolates, Grignard and lithium reagents, while 3 gave better results with the ortho-lithiated aromatic substrates.The available evidence suggests an SN2-type mechanism for the fluorination of nucleophilic substrates by these reagents.